circ_pad_plugin_triton.py

#
# SPDX-FileCopyrightText: Copyright (c) 1993-2024 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
# SPDX-License-Identifier: Apache-2.0
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#

import onnx_graphsurgeon as gs
import numpy as np
import onnx
import cupy as cp

import triton
import triton.language as tl

import tensorrt as trt
from polygraphy.backend.trt import (
    CreateConfig,
    EngineFromNetwork,
    NetworkFromOnnxPath,
    TrtRunner,
)

from polygraphy.json import to_json, from_json
import torch

from utils import volume, parseArgs


@triton.jit
def circ_pad(
    X,
    all_pads_0,
    all_pads_2,
    all_pads_4,
    all_pads_6,
    orig_dims_0,
    orig_dims_1,
    orig_dims_2,
    orig_dims_3,
    Y,
    Y_shape_1,
    Y_shape_2,
    Y_shape_3,
    X_len,
    Y_len,
    BLOCK_SIZE: tl.constexpr,
):
    pid = tl.program_id(0)
    i = pid * BLOCK_SIZE + tl.arange(0, BLOCK_SIZE)

    mask_y = i < Y_len

    i3 = i % Y_shape_3
    i2 = (i // Y_shape_3) % Y_shape_2
    i1 = (i // Y_shape_3 // Y_shape_2) % Y_shape_1
    i0 = i // Y_shape_3 // Y_shape_2 // Y_shape_1

    j0 = (i0 - all_pads_0 + orig_dims_0) % orig_dims_0
    j1 = (i1 - all_pads_2 + orig_dims_1) % orig_dims_1
    j2 = (i2 - all_pads_4 + orig_dims_2) % orig_dims_2
    j3 = (i3 - all_pads_6 + orig_dims_3) % orig_dims_3

    load_idx = (
        orig_dims_3 * orig_dims_2 * orig_dims_1 * j0
        + orig_dims_3 * orig_dims_2 * j1
        + orig_dims_3 * j2
        + j3
    )
    mask_x = load_idx < X_len

    x = tl.load(X + load_idx, mask=mask_x)

    tl.store(Y + i, x, mask=mask_y)


class CircPadPlugin(trt.IPluginV2DynamicExt):
    def __init__(self, fc=None):
        trt.IPluginV2DynamicExt.__init__(self)
        self.pads = []
        self.X_shape = []

        self.num_outputs = 1
        self.plugin_namespace = ""
        self.plugin_type = "CircPadPlugin"
        self.plugin_version = "1"

        if fc is not None:
            assert fc[0].name == "pads"
            self.pads = fc[0].data

    def get_output_datatype(self, index, input_types):
        return input_types[0]

    def get_output_dimensions(self, output_index, inputs, exprBuilder):

        output_dims = trt.DimsExprs(inputs[0])

        for i in range(np.size(self.pads) // 2):
            output_dims[len(output_dims) - i - 1] = exprBuilder.operation(
                trt.DimensionOperation.SUM,
                inputs[0][len(output_dims) - i - 1],
                exprBuilder.constant(self.pads[i * 2] + self.pads[i * 2 + 1]),
            )

        return output_dims

    def serialize(self):
        return to_json({"pads": self.pads})

    def configure_plugin(self, inp, out):
        X_dims = inp[0].desc.dims
        self.X_shape = np.zeros((len(X_dims),))
        for i in range(len(X_dims)):
            self.X_shape[i] = X_dims[i]

    def supports_format_combination(self, pos, in_out, num_inputs):
        assert num_inputs == 1
        assert pos < len(in_out)

        desc = in_out[pos]
        if desc.format != trt.TensorFormat.LINEAR:
            return False

        # first input should be float16 or float32
        if pos == 0:
            return desc.type == trt.DataType.FLOAT or desc.type == trt.DataType.HALF

        # output should have the same type as the input
        if pos == 1:
            return in_out[0].type == desc.type

        assert False

    def enqueue(self, input_desc, output_desc, inputs, outputs, workspace, stream):

        inp_dtype = trt.nptype(input_desc[0].type)

        a_mem = cp.cuda.UnownedMemory(
            inputs[0], volume(input_desc[0].dims) * cp.dtype(inp_dtype).itemsize, self
        )
        c_mem = cp.cuda.UnownedMemory(
            outputs[0],
            volume(output_desc[0].dims) * cp.dtype(inp_dtype).itemsize,
            self,
        )

        a_ptr = cp.cuda.MemoryPointer(a_mem, 0)
        c_ptr = cp.cuda.MemoryPointer(c_mem, 0)

        a_d = cp.ndarray((volume(input_desc[0].dims)), dtype=inp_dtype, memptr=a_ptr)
        c_d = cp.ndarray((volume(output_desc[0].dims)), dtype=inp_dtype, memptr=c_ptr)

        a_t = torch.as_tensor(a_d, device="cuda")
        c_t = torch.as_tensor(c_d, device="cuda")

        N = len(self.X_shape)
        all_pads = np.zeros((N * 2,), dtype=np.int32)
        orig_dims = np.array(self.X_shape, dtype=np.int32)
        out_dims = np.array(self.X_shape, dtype=np.int32)

        for i in range(np.size(pads) // 2):
            out_dims[N - i - 1] += pads[i * 2] + pads[i * 2 + 1]
            all_pads[N * 2 - 2 * i - 2] = pads[i * 2]
            all_pads[N * 2 - 2 * i - 1] = pads[i * 2 + 1]

        all_pads = all_pads.tolist()
        orig_dims = orig_dims.tolist()
        out_dims = out_dims.tolist()

        blockSize = 256
        numBlocks = (int((np.prod(out_dims) + blockSize - 1) // blockSize),)

        circ_pad[numBlocks](
            a_t,
            all_pads[0],
            all_pads[2],
            all_pads[4],
            all_pads[6],
            orig_dims[0],
            orig_dims[1],
            orig_dims[2],
            orig_dims[3],
            c_t,
            out_dims[1],
            out_dims[2],
            out_dims[3],
            int(np.prod(orig_dims)),
            int(np.prod(out_dims)),
            BLOCK_SIZE=256,
        )

        return 0

    def clone(self):
        cloned_plugin = CircPadPlugin()
        cloned_plugin.__dict__.update(self.__dict__)
        return cloned_plugin

    #
    # The following defaults take effect since the respective methods are not overriden
    #

    # def initialize(self):
    #     pass

    # def get_serialization_size(self):
    #     return len(to_json({"pads": self.pads}))

    # def get_workspace_size(self, input_desc, output_desc):
    #     return 0

    # def destroy(self):
    #     pass

    # def terminate(self):
    #     pass


class CircPadPluginCreator(trt.IPluginCreator):
    def __init__(self):
        trt.IPluginCreator.__init__(self)
        self.name = "CircPadPlugin"
        self.plugin_namespace = ""
        self.plugin_version = "1"
        self.field_names = trt.PluginFieldCollection(
            [trt.PluginField("pads", np.array([]), trt.PluginFieldType.INT32)]
        )

    def create_plugin(self, name, fc):
        return CircPadPlugin(fc)

    def deserialize_plugin(self, name, data):
        j = dict(from_json(data.decode("utf-8")))
        deserialized = CircPadPlugin()
        deserialized.__dict__.update(j)
        return deserialized


if __name__ == "__main__":

    args = parseArgs()
    precision = np.float32 if args.precision == "fp32" else np.float16

    inp_shape = (10, 3, 32, 32)
    X = np.random.normal(size=inp_shape).astype(precision)

    pads = (1, 1, 1, 1)

    # Register plugin creator
    plg_registry = trt.get_plugin_registry()
    my_plugin_creator = CircPadPluginCreator()
    plg_registry.register_creator(my_plugin_creator, "")

    # create ONNX model
    onnx_path = "test_CircPadPlugin.onnx"
    inputA = gs.Variable(name="X", shape=inp_shape, dtype=precision)
    Y = gs.Variable(name="Y", dtype=precision)
    myPluginNode = gs.Node(
        name="CircPadPlugin",
        op="CircPadPlugin",
        inputs=[inputA],
        outputs=[Y],
        attrs={"pads": pads},
    )
    graph = gs.Graph(nodes=[myPluginNode], inputs=[inputA], outputs=[Y], opset=16)
    onnx.save(gs.export_onnx(graph), onnx_path)

    # build engine
    build_engine = EngineFromNetwork(
        NetworkFromOnnxPath(onnx_path), CreateConfig(fp16=precision == np.float16)
    )

    Y_ref = np.pad(X, [[0, 0], [0, 0], [pads[0], pads[1]], [pads[2], pads[3]]], "wrap")
    # Run
    with TrtRunner(build_engine, "trt_runner") as runner:
        outputs = runner.infer({"X": X})
        Y = outputs["Y"]

        if np.allclose(Y, Y_ref):
            print("Inference result correct!")
        else:
            print("Inference result incorrect!")